Automatic bucket loader



Feb. 2, 1932. R, w DULL 1,843,124

AUTOMATIC BUCKET LOADER Filed Sept. 9. 1929 5 Sheets-Sheet l [nyc/afar Feb.'2, 1932. R. w. DULL 1,843,124

AUTOMATIC BUCKET LOADER Filed sept. 9; 1929 5 sheets-sheet 2 Feb. 2, 1932. R w, DLL 1,843,124

AUTOMATIC BUCKET LOADER Filed Sept. 9. 1929 5 Sheets-Sheet 3 [fee/Wala? qy/Wa/fJ/jal/ Feb, 2, 1932. R w, DULL 1,843,124

AUTOMATIC BUCKET LOADER Filled sept. 9, 1929l 5 sheets-sheet 4 '@jkva Feb. 2, 1932. R. w. DULL AUTOMATIC BUCKET LOADER Filed Sept. 9. 1929 5 SheebS-Sheeb 5 lia A@gy/720720Z Wa ZZ gy Q Patented Feb. 2, 1932 Unirse RAYMOND* DU ,PATENT oFFfIc-E LL, `0F CHICAGO, ILLINOIS, VALSSTENOIIR, TO LINK-*BELT COMPANY, O F

omesso, :.rtLINOIs, A CORPORATION OF' iLLrNOIs AUTOMATIC rieuoxiifr LOADER ;appuationnledSeptember 9, 192e ,serial No. 331,137.

Thisinvention relates to a bucket loader and per-'timbre tothe Centrel A@fthe bucket or its'loading mechanism used in connection withwa skip hoist installation. 'ljhe invention generally relatesto means for leither automatically or manually loadingbuckcts or containers W1thmater1al either by weight Orlbygvolume, connection .with' 'means"for teria-l been V deposited within the. bucket and the devicemay vbe' used connection with ahoisting mechanism to vlo ad a skip which may ,@perefe vertielly 0r ,in .en nclinedposition. 4Anotherobject is to' provide means vfor kautnnaftically Apermitting I an approkimate IVolume7 regardless fof weight, to Jpass'intoa bucket. Another r )bject is to provide t automatic means tor t stoppin g the flow of .,material v into the rbucket and automatically, controlling i111@ Start. .0f :its raisins movement tafterf the material has been de livered Ainto it. Another vobject is yto combine with such automatic weighing device means for closingthegateand starting the becket upward iden-tbe propelwesht .Of material haswbeen received by the bucket. Another ob] ect yis `provide such automatic mechanism' which will deliver an appreximate weighed quantity otmaterial, Olosethe gate,V start thebucket andcontinue to Y operateasleng, astheresmaterelnthe hopper- VOther objects will appear from time to time linthe Acourse,ofthe Aspeci licatim and claims. [The invention is illustrated more. or Aless diagrammatically in the accompanying limitless wherein:

l Figure l [1s .a section `through a Lloading mechanism with parts Ain* section and .parts ldofroken away, showing theloader andl bucket vgenerally .in side elevation ,with the bucket being lowered to the loadingposition;

' VFigure 2 isa similar View showing the bucket nand parts in loading rpositionfwh'ere the materialis weighedfor measured); 'i i Figure 3 is generally similar to Figures 1 and 2, showing the bucketatter apredetery mined weight of material'has been received in it and afterthe gate has been closed;

rFigure 4c is a vertical cross section .taken Online 4 4 ofFi'gure 2; i Y' I Figure 5 showsa 1nodifiedi`orm, employing the Agate'onlyl and with'the chuteromitted;

F ig u re 6 is a rfurther modification without chute or gate,` wher-e the-quantity ofmaterial delivered .to Y the bucket is manually controllefl A vLilfeparts aredesignated by ulike symbols throughout the specification and drawings.

is a .foundation with walls, A1 `forming an enclosure or space A2 within ,whichy the lower portion ofthe trackand the loading A3 isa hopper which 1s provided with an opening A'i inits mechanism is ypositioned.

-bottom through which material ina-yfbe delivered by the loading mechanism to the bucket. i

B is a Vchute ixed in the door-,way or opening A4 and is provided with a relatively long, extended ybottom B1 and a relatively short top or upper portion B2 and side walls B3.

A swinging chute formed7 in one forni, generally ot sidewalls C and abo'ttomC1 is pivoted on a shaft G2 .and is supported from the yliked chute above mentioned.

It isprovided on either'side with contact members Cwhich arein eEect laterallyextending flanges adapted to Contact a portion of the bucket in the manner described below.

Extending rearwardly from the y'movable lchute area pair of 'arms C4 C4 which are j oined' by a shaft C5 upon which are positioned counter weights CG.' The chute C may bezprovided with, a closed end C7 orwith baf- Afles C8 ras shown in Figure 3, or with both of them. A swinging gate made up of side members D, Di'and acurved bottom 'member `Orifpl'ate Dlis also supported from theixed chute and adapted to move aboutfthe pivotal ,.pointCZ. The bottom plate fD1 terminates-in an angularly disposedv lip o rftlangefl)2 which "is adapted to engage the bottom plate C1 fof i the movable chute, as indicated particularly gage ,a pin E3 on the side plates D ofthe gate.

E1 E1 are spring shock absorbers pivotally mounted on the fixed chute as at E5 land engaging at their opposite ends a member E6 on the gate and adapted to serve as a shock` absorbed to cushion the` closing movement of the gate. It willbe noticedthat when thev .gateis in the open position, as shown Vin Figure 2,'theY shock absorber is in the expanded position, and that thek compression spring E7 isrexpan'ded, while when the gate is in the closed position asshown in Figures l and 3,

the shock absorberl is., in the elongated positionand in this position the'` compression springE7 hasbeenrcompressed. It is this spring, therefore, which serves as the cushioning element.

F is a track supporting structure. It is fixed generally with relation-to the foundation hopper and associated parts and contactsthe foundation at F1. At a lpoint separate-d from its lower end F1 it carries a fixed Vweights F7, F7. l

leversF6A are slotted as atV Fsto embrace pins track jsection F2. vvAs shown, the track lis double; It could, however, be of anyY suitable shape;y Hinged at F2 to the lower endof'th'e -track-sectionF2is a mo-vablersection of track F1. `Pivotally supported as at F 1 on the supf porting member F is a pair of levers F6, F6. These levers carry at their outer ends counter At their opposite ends the F9v which are fixed in the swingingor movable track section F11. U v

G`, G are triprods provided with adjusting vmeans These rods are attached, one

on each sideV of themovable track sectiony at v the pins F9, at their lower ends and at their .upper ends they are` movably attached toplevers G2, vG2 which are themselves mounted on the shaftC2 which forms the'pivot point for movement of the gate andthe movable chute.

' G3, G? arek cams fixed witlrrelation to .the

levers G2 and adapted to be moved` by them to voperate the pawl latch' E, E.

vH is' an electric switch mounted on thebottom of the Xed chute and provided witha handle or lever H1. j H2 is a switch operating `part mounted on lthe swinging gate` Aand `adapted to move with it.

y This part is adapted to Contact and operate the switch lever H1 in the manner described below. f Y

l I isa bucket, it is provided .with .pairs of `rollers I1, I1, YPivotally attached to itrare bail members I2, I2 which may be joined by a shaft Is and carry rollers I4. I5 is a hoisting cable of which there may be one or more. I, I6 are brackets mounted preferably on either side, at the top,v of the front plate of f the bucket and carrying rollers I7, I7 adapted to contact chute. j

- It will be realized that while kI have shown and described an operative device,l `many changes may Vbe made inthe size, shape, relation, proportion and distribution of parts without departing materially from the spirit ofmy invention, and I wish, therefore, that thisdescription and showing be considered as in a large measure diagrammatic. v'-Ihe bucket may also be arranged for loadingand weighing and measuring in a vertical aswell as in an inclinedposition.

The modified form shown in Figure 5 is generally similar to the form shown-in Figures l and 2 except t1 the flanges C1 of theswinging nat the chute is omitted.

The construction of the form shown in Figure Y 5 is'substantially the same as that of Figure 2. The gate and other partsare the same. Since the chute is omitted, the latch E is pivotally supported not from the chute but from members E6 mountedon the iiXed chute B. The track, counterweight and other associatedv features are the same as those shown in Figures land 2.` l

In the form shown in,y Figure 6 a pit J 'is provided with foundations and. walls J1., J1,

Tracks J 2, J2 are joined yto the floor of the pit and are adapted to carry a dumping truck lJ3 whichphasea d umpingbody J4 tiltably mounted on it. J 5 is a fixed hopper having an inclined-bottom J 6 and an open discharging side J 7'.v 'The track J 8 extends into the pit and is supported from'a member J 2 which is itselfsupported from the foundation J1.

. A second track L extends into the pit and is generally parallel with the track J 8. lt is provided with a movable portion L1 which is attached by a hinge or other suitable means as at L2 to the track L. L3 is a lever'pivotally supported from the track J 2, at L1 and connected, at one end to the movable track sectionL This counter weight through the lever is adapted to hold the track section L1 upward so that it forms a continuation of the track L. The arrangement of thek counter weight is such that when sufficient weight of material falls within thebucket, ,the counter weight is raised the ltrack section tilted or swung into the position shown in Figure 6;

M is a bucket having krollers M1 M1, one pair of which run on the track J8 and the others on the track L L1. M2 is fa bail pivota-lly mounted at M? on the l'bucket M carrying'at its upper end one or more rollers M'1 M1 which engage vthe tracks L L1.,y 'M5 is a hoist-Y ing cable fastenedv to the j bucket bail and adapted to raise, lower 'and control the position of the bucket. f'

.555 iowing into the bucket.

. a switch having a Contact ar1n N1 so situated that it is contacted Vby the plvoted track portion L1 when it swings into the positionshown in Figure 6. N2 N2 are wires in the action-of thev switch N. Thus when aA weightof material sufiicient to cause the track to swing, permitting the bucket to move, has 15 fallen within the bucket, the track L will swing into the position shown/in Figure 6, and the switch N will be operated, but this action will be somewhat delayed by the delayed action switch so that the hoisting mechanism which is in connection both with the limit switch and delayed action switch will not be set. in motion at once, in order to give sufficient time for all of the material in the cargto discharge into the bucket. Thus an appreciable delay is provided after the activating of the switch N before the hoisting mechanism is set in operation to raise the bucket. Y

The use and operation of this invention are as follows:

p The mechanism shown may be made to operate in several different manners. Complete automatic operation is possible, operation which is manual in its control is possible andfoperation which is partially manual and partially automatic is possible.

I. Assuming the parts are in the position indicated in Figure l, the gate is closed and the chute is in the upper position Aand the bucket is not in contact with either of these loader parts. The bucket is being lowered to the loading position and the rollers I7 contact the flanges C3 and move the swinging chute downward. The chute is joined to the gate by means of the latches E and their engagement with the pins E3 on the gate. Therefore the gate and chute being in engagement with each other, move together under the influence of the downward movement of the bucket into the position indicated in Figure 2. In this position the tiltable track section is held in its normal up position by the counter weight F7. Tf there is material in the track hopper it isv now discharging or When a sufficient weight of material has been received in the bucket, the bucket and the material will. `overbalance the counter weights which hold the tilting section of the tracks in the up posi- '60 tion, and when sufficient weight has been received into the bucket,the tracks tilt into the osition shown in Figure 3. The trip rods or then Voperate the cams G3 until they have swung the latches E upward. Thus the hooks 65 E2 have moved out of contact with the pins E3 and the gate is no longer held in the downward or open position by the chute, as in Figure 2.k It is then free to move under the inluence of the counter weights D4 into the closed position shown in Figure 3, thus cutting ofl3 further low of material into the bucket. When the gate moves into the closed position, it operates the switch H, which isin circuit with the electrical motor control equipment for starting the hoisting operation. lVhen the bucket is moved upwardly along the track out ot the pit, its upward movement may or mayl not co-operate with the influence of the counter weights Cc to move the swinging chute from the Ypositi on of Figures 2 and 3 back to the closed or upper position shown in Figure l and when the parts have reached this position the latchesy E again engage through the hooks t2 the pins E and the swinging chute and gate are thus again locked together. The hoisting movement of the bucket continuesl until 1t reaches the dumping point, where it is stopped and the bucket is inally discharged, and after discharged, is again lowered into the pitfor further loading. The electric wiring between the motor and the switch H is provided with the necessary control apparatus to automatically take care of the buckets excursion after the switch H has been closed. As the electric control apparatus beyond the switch H constitutes no part of this invention and is well known to those familiar with skip hoists, it is not shown or described.

As the gate is returned to the closed position as indicated in Figure 3, and as the bucket is raised, the chute is free to move again to the upperor closed position VindicatedinFigure l. As it does this the cam E is of course carried with itand swinging about its pivotal point E1 its hook portion E2 again engages the member E3 on the gate, and again the parts are in the position shown in Figure l. in whichvthe gate yand chute are fastened together. Therefore, when the bucket is again lowered it will engage the chute and move it and the gatetogether into the loading position shown in Figure 2. The arrangement is such that the bucket can be operated either empty or with, less than a full load by means of a push button or other manual control so that the bucket hoisting controlsl switch H may be manually operated or its circuit closed. Thismay of course be done without any automatic hoisting control and it maybe done in combination with the automatic controllinoa means, by weight or by volume. This manual control may, ot course, be accomplished without any automatic hoisting control and it may be done in combination with the automatic controlling means, and it may be done when the bucket is automatically loaded' and controlled by n weight or when it is automatically loaded 18o and; controlled@ With3nottoeXceed a, given volume iofv material; .y Y,

p ISI. yAnother Way. inwhich the mechanismV may be operatedlis as follows: This` method -.jdiiersgenerally from f that justdescribed klaboveiingtheffactthat the gate and chute,lal

' thoughla rrangec-y for relative m(krement,,arel

locked; together and operated in unison Ifordelivering into the receptacle anV amount not ,exceeding a given volume. In this form of operationthelwinding drum automatically controlled and voperated on' a iixedstimed cycle,or'may be oper-ated manually by a pushlbutton. VThe Weight operatingr feature Aabovegdescribed in connection :with the hrst method is cutout and .is inoperative. rllhis is madepossible by having the Aelectric switch H in the eleetricjcircuit with the motordrivingjfthe- Winding machine soV that itmar be -cut out or cutfin'as desired. Therefore, the

l electric switch may bereut out and the movement ofthe gate, chute or any ofthe associatedparts Will Vnot be effective to start or con-v trol the hoistingwengine. v

'rllhe .tilting` track ,may vorv may not be blocked by the part K of Fig. 1, so that it cannot swing-downto unlatch the gate from the chute. Thus thel gate and the .chute are heldtogether in all positions and the switch .-,isoperation abo-ve kdescribedin connection with the first method cannot take place. Y

V'Wherev the Weight Operating. feature is' cutout the. hoisting engine is normally started by a traveling cam.limitsivitclnl This switch1 may be of any 'suitable'type' and is Well known in theart and. is not shown or described.. In general it operates to control [the hoisting engine so that. the Ybucket is movedtoits various positions along the track and is stopped ,atl predetermined points for predeterminedev time intervals. rllhis method of'operation differs generally from that first described. above bv: the.y factv that the Weight of`r the bucket andY material do not serve to control ythe stopping? and,v starting of the the position shown in Figure 3, the gateand the Achute Will'remain llocked together and if there is material i'n the track hopperit will, with vthe'partsin'the position shown in Figure 2, discharge into-'the bucket and the ma-r 'jteri'alt williill thebueket and dam up inthe chute *against theend-f C7' andthe baffi-es C8.V yAfter the travelingl cam limit switch driven from the'vvinding engine provides suiiicienty time forthe'buckettofill, the hoisting oper.-

-ation will' automatically.. take place and any materialremaining inthe chutejWill either fall; into the bucket.orremainginfthe chute, when the lattery is moved to its raisedposi-y tion. the bucket moves upward Vthe Vgate andchute, since they are .locked together,- move upward together4 and the gate thuscuts v4the/flow of material. rfrom the hopperf.

fthe bucket is handling a material of which the Weight of a volume suiiicientito `iill lthe bucket in combination With the Weight of the bucket is suiiicient to tilt the-railsfinto the position, shown in F igure, iti-then becomesk necessary to Vprovide positive vmechanical means .to-prevent the rails fromltilting and thus of course to prevent the unlatchingof the gate frcinzthe chute before the bucket becomes completely filled. p operationyvvhether the track be y'blocked againsttilting, orthevsvvitchH be cutout,

the hoisting operation is l as above described, and is controlled bythe travelingv cam limit" switch andfinallV positions the gate and chute remain latched together and heldagamst relative movement.

'Ill lt is desirable' at times to havethe skip controlled afndroperated on a definite time r cycle and not the starting of thehoisting operation controlled by the Weight of the skip and the material init,v as setforth under method l. For this operating condition asln this mode ofA sume the parts in position shotvnunder Fig. Y land skip is lowered to loading position Fig.

2, allowing material to discharge intothe skip.)y

During the, time a definite predetermined Weight ofy materialhas been discharged Within theskip, the skip or Y its associated parts have been movedl into position.Fig.V the Weight'of the skip and material init and the gate hasclosed but .the gate does notfmove or actu-atesvvitch H as it Ydoes fork operation method l.' The travelingcam limit switch is set toallow enough time for material to dis-` charge from stationary hopper to properlyy load the skip beforel itv automatically vstarts the hoisting andi-other operations.` The bucket gateand chute are controlled` as described ,under method Il except the'chute need not be of the .damming typey and the vgate moves relaiveto-the chute VWhen the gate movesffromdischarging to closed position'.`

IV. Asshown in VFigure 5 themechanism is generally similar tothat shown in 4thefiirst four ngures but the extendedchute C 1s omitted. The operation olthefformshownin Figure 5 therefore is as follows: y As shownV in that figure the bucket has been lowered to the loadingI position. l The gate is open andif thereis material in the hopper itis discharging l.into-*the bucket. When sufficient matef4 rial has passed into the bucket :so Vthat the'- Weight ofthe bucket and the material is suf,

downward, pulls the lrod. G, swingsl thefcam G2' Gre' about', the pivot C2 vand unlatches the cami'E-ihfromythe pins Etonv the gate," and;

irse

47Vio ythe winding machine.

permits the gate to close under the influence of the counter weights D, shutting olf the flow of material from the' hopper. The gatein closing actuates they switch H and thus completing the electric circuit controlling the hoisting, emptying, lowering Aandstopping operations of the hoisting machine which actuates the bucket. The bucket is raised, sto ped, dumped and returned automatically to t e position for reloading.

This same mechanism could be operated without the automatic track swinging feature provided by the use of the switch H. rlhis switch might be cut out in the manner described in connection with No. Il and No. III above, and the movements of the bucket could beautomatically controlled as its hoisting, emptying, discharging andl loading operations on a predetermined cycle by means of aV traveling cam limit switch driven from Of course, several types of controls actuated by the bucket or itsassociated parts might 'be used with the general construction shown in Figure 5 where the chute is omitted. Generally, therefore,

the structure shown in Figure 5 may be operated on a completely automatic cycle controlled by the switch H or it may be operated f without this switch and in that case the closingfof the gate does not start the winding machine control equipment. In this operal Y tion the switch shownin Figures 1, 2 and 3 Would not be necessary.

`V. A further modified 'form of. mechanism is shown in Figure 6. This mechanism embodies an automatic control for thek bucket which is operated by the weight of a bucket l andthe weight of the material delivered to it. lIn this form of the mechanism a delayed actionswitch is used` and the form of mecha- -nism shown in Figure 6, without any gate,

the material may be delivered to the bucket, the fixed hopper J5, or in some connections .the hopper J 5 may be omitted, and the material is delivered directly from the car body J 4 into the bucket. In either of these :forms there is no gate. Without any gate and especially it' a slow flowing material being dischargedV into the bucket, means may have to be provided to allow suiiicient time orall material which is discharged froml the car J4 -to reach the bucket. Where the Vcar J t is vdumped directly into the bucket, a suiicient 'to actuate'the switch N as shown in Figure 6 before'` all the material from the car reaches the bucket, otherwise the weight of the material and the bucket might not be suiiicient to operate the switch land the bucket M might not be hoisted,

' emptied and returned to the ,loading position ready to receive the next car of material in sucient time. Preferably the counterweight L5 is set to tilt the track M after a small part of the cars contents has reached the bucket in response to the added weight of a minimum predetermined weight of material. The delayed relay and the predetermined minimum weight for actuating the switch automatically takes care of various loading conditions so that the attendant has only to bring the car to the loading point, dump its contents into the bucket and remove it as the bucket hoisting, emptying, lowering, and stopping for reloading operations are all automatically taken care of. The delayed action is to permit complete discharge of slow liowing material and removal of the car vbefore the bucket is hoisted.

The importance of the delayed action switch is obvious, not only for taking care ot sluggish flowing material and removal of the car, but also to meet certain operating conditions that'will occur when car or cars containing less than the predetermined minimum weight of material are emptied into the bucket.

The switch will not be actuated by a car or cars containing less than the predetermined weight of material but it will .be actuated by a car or cars containing any weight of material in excessy of the predetermined minimum weight required for tilting the rail.

The bucket preferably should have sufficient capacity to hold the contents of ka full loaded car plus the volume of a car or'cars containing insufiioient weight (less than the predetermined minimum weight) of material required for tilting the track and actuating the switch.

Various methods of operating the equipment above outlined may be further varied by the use of manual switches, controls and the like, which may be loca-ted at suitable points along the equipment so that the operator may control and vary the method of operation.

Under some conditions, as set out above, it `will be desirable not to have the weight operated feature. This weight operated feature can be cut out by the provision of the bell crank latch K which, by means oi a connecting rod K1 leading up to the operators seat, may be rotated into and out of position above the counterweight F7 so as to lock it down and prevent its yielding with the load in the skip. When this is done, the gate will not be unlatched from the chute it when it rotates upwardly responsive to the ymovement of the skip. As an alternative switchA controlled bythe Winding machine,

or controlled directlvv `md manually, by the operator,as the case may. be,v Thisconstruction may be used, .of course, Whereverfitfis desirable for any `reason to preventthedownvvard swinging ofthe track sectio1iF4.

1'. In combination ina hoist, a iixed receptaclev and a movable receptacle, tracks adapted to carry said4 movable .receptacle to a position suitable for receiving and removingr-material; yfrom said linedv receptacle, a vportion of' said,k track adapted for limited movement under ythe'iniiuence ot'the combined, Weight ,of the movable receptacle and ,combined- Weight ofthe movable receptacle and its loa-d, a nrovable" chu-te "and ,a movable gate adapted to. control the. discharge. etma- .terial-,fromthe receptacle. andt adapted to haverelativc movement, means for 'engagingthem against relative movement, and

means flor, freeing the: est@ t0 remit it i0 close, said means operative infresponseto .lateral5 movement of the movable receptacle.

' S In combination inahoist, means for antoniatically and, positively vdeliveringK an proximately predetermined Weight ofxmaterial, into a container, vsaid means comprising a hopper, a track, a receptacle adapted to ymove along` said track to receive material from; saidfhopper, meansv for movingfthe'receptaele, a chute and/a gate, relatively mov.

able, and means for actuating-*the chute and ythe gate tofc-ause thetvvo to move; 1n unison,

the receptacle being-.provided with partstoV move'lthe chuteandthe gate into their dischars@ pQSltlQIl; a roftlQIl-Oithetrack bellas movable in response to the Weight oi., the re -cept'ac'le and load, means operated the movement of movable track portioniior disconnecting the chute andgate whereby when said track portion moves, the gate is free toreturn toits closedposition.

combination'in a hoist, means for automaticaliy and .positively delivering an appro,einlatgely` predetermined VWeight of nia-- terialinto arcontainer, said means comprising a hopper, a` track, a receptacle adapted` to move4 along said track; to receive material froinfsaid hoppenmeans foremoving there- Ycfantacle, a chute and ai gate relatively movable, and means for actuating the4 chute and thegat-e t0. Cause the two to move in unison,

the gate adapted to move to its closed posit1'on,.the receptaclel beingprQVidedWith parts ltoengage the chutek to move it and the gate into the discharging position, a p ortionof` the track being movable i'n response to 'the .Weight of;- the receptacle and load, means op,-

erat'ed by the movement of said movable track portion for disconnecting the chutev and gate ywhereby movement of saidfftrack portionpermits the gate to return to its closed position.

"5;l In combination in a hoist, means for f automatically and positivelyA delivering an approXimatepredetermined Weight of matef rial. into a-Y container,A said means comprising a hopper,"`atrack, a receptacle adapted to movealgong said track to receive material from said hopper, means for moving the receptacle,` a chute anda gaterelatively movable,A and means for; actuating the; chute and the gate to canse tl'ietvvo to, move in unison, the chiitev and gate veach being; counter weighted and adapted,`. when free to move, to move totheir closed position, the-receptacle being provided with? a part-to engage the chute to 'move it'andf the gate into their discharge position, a; portion of the track. be-

ing movable in response to; the vveightofithe receptacle? and load, means'operated bythe 'movement oisaid movable;` trackportion for Vdisconnecting the chute and: gatevvvherehy Vmovement of said.` track portion permitsfthe gate to returnto its closed position.

'6. In combination in a hoist', means for automatically and positively, deli-veringV an lapproximate predetermined Weight of matcrial into a container, said'meanscomprising a hopper, a track, a receptacle adaptedto move f ,Y

along said: track tofreceive'material fromsaid hopper, meansrior moving the receptacle, 'a chute and a gate relativelyY movable, and

*inea-ns' y'pivotedon thefchute for 'actuating the' chute and thefgate to Acause thetwo; to i move in unison,'th'e`chute andthe gate each 'being'counter Weighted, the receptacle bei-ng `provided with .parts to engage 'the chute to move it', and theY gatev into theV discharging position, a portion ofthe track beingwmovable 'fin responseto the Weightfof the receptacle and load, means operated byv the nio-vement foffsaidrmovable track portion fordisconnecting the chute Eand gate whereby movement `of said track portion permits the gate to, re-

turn to its'close'd position.

"7.; in combination in a hoist, meansv vfor lautomatically and, positively delivering an Vapproximate .predeterminecl Weight of materialinto a container, saidmeans comprising a-l1opp.er,'a track, a receptaoleradaptedto move along said tgraclrfto-V receive material from said hopper, means 'for moving the receptacle, a'chuteand a gate riveted-0n the hopper and, relative-iv movable and means?ff'`rpivoted on the chute for actuating the chute levers, counterweights, and connections from and the gate to cause the two to move in unithe movable track section to the cams.

son, the chute and the gate each bein Signed at Chicago, county of Cook, and

counter weighted and adapted, when tree to State of Illinois, this 31st day of August, move,fto move to their closed position, the 1929.

receptacle being provided with parts to engage the chute to move it and the gate into their discharge position, a portion ot the track being movable laterally in response to the weight of the receptacle and load, means operated by the movement ot said movable track portion for disconnecting the chute and gate whereby movement of said track portion permits the gate to return to its closed position. f

8. In combination in a hoist, a hopper, a

bucket adapted to receive material from said hopper, material guiding and controlling rmeans including a movable gate and a movable chute, the two adapted for independent movement, and means tor ioining them together, the gate provided with parts adapted to engage the chute in its upper positionand to cause the chute and gate to move into their discharge position, and means responsive to the weight of the bucket and the material in it for causing additional movement adapted automatically to free the gate from attachment to the chute whereby the gate is permitted automatically to close, and a hoist controlling mechanism adapted to be operated automatically by the gate in its closing movement.

9. In combination in a hoist, a hopper, a bucket, means for starting, stopping, raising and lowering the bucket, means. for discharging material from the hopper into the bucketsaid means including a movable gate and a movable chute, one of them carrying an attaching means whereby the two may be Vjoined together. the two adapted to move together under the influence of the moving Vbucket to the loading position and a cam and cam operating parts adapted to be moved by the weight of material in the bucket to actuate'the gate and chute connecting means to disconnect the two and thereby to permit relative movement of the two.

10. In combination in a hoist, a hopper, a bucket, means for starting, stopping, raising and lowering the bucket, means tor discharging material from the hopper into the bucket,

said means including a movable gate and a movable chute, one of them carrying an attachmg means whereby the two may be i 'joined together, the two adapted to move together under the influence of the moving bucket to the loading position and cams and cam operating parts adapted to be moved by the weight of material in the bucket to operate upon the gate and chute connecting means'to disconnect the two and thereby to permit relative movement 4of the two, said means including a movable track section,

RAYMOND W. DULL. 

